Add DispenseBehaviorFireworks and EntityFireworks for diff visibility

src/main/java/net/minecraft/server/DispenseBehaviorFireworks.java

@@ -0,0 +1,26 @@
+package net.minecraft.server;
+
+public class DispenseBehaviorFireworks extends DispenseBehaviorItem {
+
+    final MinecraftServer b;
+
+    public DispenseBehaviorFireworks(MinecraftServer minecraftserver) {
+        this.b = minecraftserver;
+    }
+
+    public ItemStack b(ISourceBlock isourceblock, ItemStack itemstack) {
+        EnumFacing enumfacing = EnumFacing.a(isourceblock.h());
+        double d0 = isourceblock.getX() + (double) enumfacing.c();
+        double d1 = (double) ((float) isourceblock.getBlockY() + 0.2F);
+        double d2 = isourceblock.getZ() + (double) enumfacing.e();
+        EntityFireworks entityfireworks = new EntityFireworks(isourceblock.k(), d0, d1, d2, itemstack);
+
+        isourceblock.k().addEntity(entityfireworks);
+        itemstack.a(1);
+        return itemstack;
+    }
+
+    protected void a(ISourceBlock isourceblock) {
+        isourceblock.k().triggerEffect(1002, isourceblock.getBlockX(), isourceblock.getBlockY(), isourceblock.getBlockZ(), 0);
+    }
+}